Energy saving regulation in full formwork, roofer, full formwork balcony

Hello, I have a question, I hope you can help me with:

My roof was insulated about 25 years ago with 80mm insulation between the rafters, there is a solid boarding on the beams and everything inside is finished. Now the thing is, I would like to have my roof redone, but if possible without having to add additional insulation.

I visited a roofer who told me that I don’t need to add insulation because, due to the existing solid boarding, there would be an extraordinary effort and therefore the applicable energy saving regulations would not apply.

My actual question now is whether this statement is correct, as it would of course be best for me?

Thank you very much in advance!

...My roof was insulated about 25 years ago with 80mm insulation between the rafters, there is a solid sheathing on the beams and everything inside has been finished.

What kind of roof? Pitched or flat roof? What is under the roof? Heated living spaces? What is the rafter height? > 80 mm? It's not that simple! ;-) Minimum U-values apply that must be met.

...I was at a roofer who told me that I did not need additional insulation because the existing solid sheathing would cause extraordinary effort and thus the applicable Energy Saving Ordinance would not apply.

For an exemption (§25 Energy Saving Ordinance) a report would be required proving an economic disadvantage! The roofer has no planning authority, this lies with the builder. Therefore, the builder is always responsible for complying with the valid laws.

.....as it would naturally be best for me?

That should be reconsidered.

Best regards